Sun Fire™ Midframe Server Configuration Best Practices
Contents
1. m Sun Fire 6800 4810 4800 3800 System Controller Command Reference Manual Sun Document 1805 7372 m Sun Fire 6800 4810 4800 3800 Systems Service Manual Sun Document 1805 7363 m Sun Fire 6800 System Installation Guide Sun Document 805 7375 m Sun Fire 4810 4800 3800 Systems Installation Guide Sun Document 1805 7370 m Sun Fire Cabinet Installation and Reference Manual Sun Document 1806 2942 m Securing the Sun Fire Midframe System Controller Sun Blueprints OnLine September 2001 m Sun Field Engineer Handbook 18 Author s Bio James Hsieh is a member of the Sun CPR Engineering Americas formerly HES CTE group and is part of the team responsible for providing engineering support of Sun s midrange server line Prior to his current role with CPR Engineering James worked for Sun Enterprise Services supporting Mission Critical customers Prior to Sun James worked for over ten years with UNIX and Sun systems as a software engineer and as a systems administrator for large groups of UNIX systems Sun Fire Midframe Server Configuration Best Practices September 20012. errors is the primary reason that segmentation is recommended for multiple domain configurations In the case that customer requirements include multiple domains on any single Sun Fire system the system should be divided into two segments so that each segment contains a minimum number of domains If a Sun Fire system only has one domain the system should remain in a single segment System segments are configured on the SC by running setupplatform heslab 12 SC gt setupplatform p partition Partition Mode Configure chassis for single or dual partition mode dual heslab 12 SC gt Platform Configuration 13 Multiple segments do not come completely without cost Segmenting a system divides in half the theoretical maximum data bandwidth available to the domains within the segment although it preserves snooping address bandwidth However even if performance is of the highest concern dual segments may still be the preferable configuration This is because the applications running on the domain may not be capable of exceeding the lowered bandwidth capacity and may be affected more by the reduced snooping address bandwidth that two domains in a single segment will cause For mission critical roles two segments containing one domain within each segment is ALWAYS preferred over two domains within a single segment because of the error isolation features Segmenting a Sun Fire system into two segments also limits the reconfigurati
3. 4800 or 4810 server has two Fireplane Switches RPO and RP2 and requires a minimum of one Fireplane Switch per segment On the 3800 the Fireplane Switches are actually integrated with the centerplane The diagrams in FIGURE 6 illustrate possible domain segment combinations for these systems Sun Fire 3800 4800 4810 Single Segment Domain Allocation RPO RP2 Segment 0 Domain A Domain B Sun Fire 3800 4800 4810 Single Segment Domain Allocation RPO RP2 Segment 0 Segment 1 Domain A Domain C using Domain B MAC Addr 1 As of June 2001 this is the behavior of 3800 4800 4810 systems when segmented FIGURE6 Domain Segment Combinations for Sun Fire 3800 4800 4810 and Two Fireplane Switches Sun Fire Midframe Server Configuration Best Practices September 2001 A 6800 contains four Fireplane Switches RPO RP1 RP2 and RP3 and requires a minimum of two Fireplane Switches per segment The diagrams in FIGURE 7 illustrate the possible domain segment combinations Sun Fire 6800 Single Segment Domain Allocation RPO RP1 RP2 RP3 Segment 0 Domain A Domain B Sun Fire 6800 Single Segment Domain Allocation RPO RP1 RP2 RP3 Segment 0 Segment 1 Domain A Domain C Domain B Domain D FIGURE7 Domain Segment Combinations for Sun Fire 6800 server and Four Fireplane Switches While it is possible for a single segment to contain two domains the isolation of
4. Configuration Best Practices September 2001 TABLE 1 Sun Fire 4800 4810 6800 8 Slot PCI I O Assembly Layout Continued Slot Slot Capacity VO Controller Bus 5 33MHz 5 VDC 1 B 6 33MHz 5 VDC 1 B 7 66 33MHz 3 3 VDC 1 A lt Handle Ejector levers gt TABLE 2 Sun Fire 4800 4810 6800 4 Slot cPCI I O Assembly Layout Slot 0 Slot Capability 66 33 MHz 66 33 MHz 3 3 VDC 3 3 VDC 1 0 Controller Bus 1 A 0 A gt TABLE 3 Sun Fire 3800 6 Slot cPCI I O Assembly Layout Slot Slot Capability VO Controller Bus 0 66 33 MHz 3 3 VDC 0 A 1 66 33 MHz 3 3 VDC 1 A 2 33MHz 5 VDC 0 B 3 33 Mhz 5 VDC 0 B 4 33MHz 5 VDC 1 B 5 33MHz 5 VDC 1 B The latest Sun Field Engineer Handbook available through Sun Enterprise Services also contains diagrams showing which slots on an I O Assembly are controlled by which bus Platform Configuration 11 12 The Sun Fire servers incorporate the concept of domains along with the new concept of segments When a server is divided into two segments the software in the SC logically isolates connections of one segment from the other so that the failure of one domain within a particular segment will normally not affect the domain s running in the other segment an unlikely exception where an error might not be contained would be in the case of a centerplane failure Every Sun Fire Midframe server can be configured for a maximum of two segments A Sun Fire 3800
5. Power Configuration 3 For power failover capabilities check that the racks for Sun Fire 3800 4800 and 4810 systems are ordered with the Dual AC Input option which includes a second RTS for the RTU The standard configuration may only have a single RTS in an RTU As Sun Fire 6800 servers have higher power requirements and are internally divided into two separate power grids these servers come standard with two RTUs and should also come configured with a full compliment of four RTS modules Be sure to consult the Sun Fire 6800 System and Sun Fire Cabinet Rackmount Placement Matrix document when adding supported devices to the Sun Fire Cabinet to ensure proper placement and power configurations Platform Configuration This section covers system controller configuration Sun StorEdge D240 Media Tray storage configuration configuring segments and domains and additional Sun Fire 6800 configuration System Controller Configuration Overview m Configure the system with two system controllers a RS 232 Port should be accessible during the initial setup m Use a 100BaseT Ethernet connection m Put the System Controller on a switched private network m Setup logging m Set SCPOST diag level to max m Set platform and domain passwords All Sun Fire Midframe servers are controlled by a Sun Fire System Controller SC Configuration of the SC is the first step in the configuration of a Sun Fire server A Sun Fire server regui
6. snmp SNMP Platform Description heslab 12 eng 4810 Platform Contact james hsieh east Platform Location MPK12 2711 Enable SNMP Agent yes Trap Hosts 129 154 221 220 Public Community String P public Private Community String P private heslab 12 SC gt console a Connected to Domain A heslab 12 A gt setupdomain p snmp SNMP Domain Description Domain A of heslab 12 ME Domain Contact james hsieh east Trap Hosts 129 154 221 220 Public Community String A public Private Community String A private heslab 12 A gt Detailed setup information is discussed in the Sun Fire Midframe Server Administration Best Practices document and in the Sun Fire 6800 4810 4800 3800 System Controller Command Reference Manual When setting up the SC the SCPOST level should be set to maximum to ensure that the SC hardware is given a thorough testing before being placed into service SCPOST output is available only through the serial port The entry will look like heslab 12 SC gt setupplatform p sc SC POST SC POST diag Level max max heslab 12 SC gt Platform Configuration 7 The platform and domain shells should be password protected using the password command in the SC heslab 12 SC gt password Enter new password Enter new password again heslab 12 SC gt From the platform shell one has the ability to set or change the platform and domain shell passwords From a
7. the first RTS In order to provide failover capabilities to the systems and storage contained in a Sun Fire rack each RTU in the rack should have two RTS modules Each RTS should be connected to a power source separate from the other RTS Separate power sources originate from a different commercial source or Uninterruptible Power Supply UPS Phase matching between the two power sources is not required Both RTS modules from a single RTU should never be plugged into the same power source If a separate power source is unavailable the second RTS unit in an RTU should be disconnected until a second separate power source is available If both RTS modules are plugged into the same power source brownout conditions can 2 Sun Fire Midframe Server Configuration Best Practices September 2001 cause the RTU to power off as a brownout may cause an active RTS to try to unsuccessfully switch to the second RTS module experiencing the same brownout If the second RTS is not connected the active RTS does not attempt a switch FIGURE 1 and FIGURE 2 illustrate power connections for Sun Fire Midframe servers Power Source A Power Source B FIGURE1 Sun Fire 3800 4800 4810 Rack With Single RTU Configured Sun Fire Rack Sun Fire Rack Power Source A Power Source B FIGURE2 Sun Fire 6800 Rack With Two RTUs Configured Refer to the Sun Fire Cabinet Installation and Reference Manual for more specific configuration and installation instructions
8. DE TIERS CE DENI DE GARANTIE NE S APPLIOUERAIT PAS DANS LA MESURE OU IL SERAIT TENU JURIDIOUEMENT NUL ET NON AVENU S a Please Adobe PostScript Recycle Sun Fire Midframe Server Configuration Best Practices The Sun Fire 3800 4800 4810 and 6800 Midframe servers are highly configurable and provide new features capabilities and technologies Proper planning during configuration and installation will increase overall system Reliability Availability and Serviceability RAS The emphasis of this article is to recommend Best Practices to achieve these goals and aid in configuring a Sun Fire system for mission critical applications Specifically this article covers the following topics m Power Configuration m Platform Configuration with special notes for Sun Fire 6800 server m Memory and I O Configuration Consider the function and reguirements of the machine prior to following recommendations made in this article While many recommendations made here apply to the majority of cases not all recommendations will apply to every circumstance Power Configuration Overview m Configure two RTS Modules per RTU m Separate power sources for each RTS m If separate power sources are not available use only one RTS m Check the Sun Fire 6800 System and Sun Fire Cabinet Rackmount Placement Matrix Sun Document 816 2062 when adding supported devices to the Sun Fire Cabinet Sun Fire servers that are either facto
9. LUE mM Y i a a 04 Sun Fire Midframe Server Configuration Best Practices By James Hsieh High End Services Engineering CTE HES CTE Sun BluePrints OnLine September 2001 amp SUN microsystems http www sun com blueprints Sun Microsystems Inc 901 San Antonio Road Palo Alto CA 94303 USA 650 960 1300 fax 650 969 9131 Part No 816 2122 10 Revision 1 1 09 26 01 Edition September 2001 Copyright 2001 Sun Microsystems Inc 901 San Antonio Road Palo Alto California 94303 U S A All rights reserved This product or document is protected by copyright and distributed under licenses restricting its use copying distribution and decompilation No part of this product or document may be reproduced in any form by any means without prior written authorization of Sun and its licensors if any Third party software including font technology is copyrighted and licensed from Sun suppliers Parts of the product may be derived from Berkeley BSD systems licensed from the University of California UNIX is a registered trademark in the U S and other countries exclusively licensed through X Open Company Ltd Sun Sun Microsystems the Sun logo Sun BluePrints Sun Fire Sun StorEdge and Solaris are trademarks registered trademarks or service marks of Sun Microsystems Inc in the U S and other countries The OPEN LOOK and Sun Graphical User Interface was developed by Sun Microsystems Inc for its users
10. Supply O a PS1 0 On A152 Power Supply OK PS2 0 On A152 Power Supply O PS3 1 On A152 Power Supply OK PS4 1 On A152 Power Supply OK PSS 1 On A152 Power Supply O FTO 0 1 On Fan Tray Low Speed OK FT1 O On Fan Tray Low Speed OK FT2 0 1 On Fan Tray Low Speed o FT3 0 1 On Fan Tray Low Speed o RP0 0 On Repeater Board OK RP1 0 On Repeater Board O RP2 On Repeater Board OK RP3 On Repeater Board OK NO SBO 0 on CPU Board Assigned Not Tested A NO SB1 on CPU Board Assigned Not Tested C NO SB2 0 On CPU Board Assigned Not Tested A NO SB3 on CPU Board Assigned Not Tested G NO SB4 0 On CPU Board Assigned Not Tested A NO SB5 on CPU Board Assigned Not Tested ol NO IB6 0 On PCI I O Board Assigned Not Tested A NO IB7 On PCI I O Board Assigned Not Tested g NO IB8 0 on CPCI I O board Assigned Not Tested A NO IB9 On PCI I O Board Assigned Not Tested 0 The following showboards v command output from a Sun Fire 6800 system demonstrates a proper division of boards between the two power grids for a dual segment system Memory and I O Configuration Overview m Set memory interleave settings for within board and optimal a Distribute additional memory evenly among CPUs m Balance I O channels There are a number of items relating to performance which directly impact system availability It is important to understand these issues so proper decisions can be made in the configuration of
11. and licensees Sun acknowledges the pioneering efforts of Xeroxin researching and developing the concept of visual or graphical user interfaces for the computer industry Sun holds a non exclusive license from Xerox to the Xerox Graphical User Interface which license also covers Sun s licensees who implement OPEN LOOK GUIs and otherwise comply with Sun s written license agreements RESTRICTED RIGHTS Use duplication or disclosure by the U S Government is subject to restrictions of FAR 52 227 14 g 2 6 87 and FAR 52 227 19 6 87 or DFAR 252 227 7015 b 6 95 and DFAR 227 7202 3 a DOCUMENTATION IS PROVIDED AS IS AND ALL EXPRESS OR IMPLIED CONDITIONS REPRESENTATIONS AND WARRANTIES INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT ARE DISCLAIMED EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID Copyright 2001 Sun Microsystems Inc 901 San Antonio Road Palo Alto Californie 94303 Etats Unis Tous droits r serv s Ce produit ou document est prot g par un copyright et distribu avec des licences gui en restreignent l utilisation la copie la distribution et la d compilation Aucune partie de ce produit ou document ne peut tre reproduite sous aucune forme par quelque moyen que ce soit sans l autorisation pr alable et crite de Sun et de ses bailleurs de licence s il y en a Le logiciel d tenu par des tiers et qui comprend la technologie rela
12. d for most configurations including those which include multi board domains If all memory on a system board is comprised of the same sized memory DIMMs memory access will be optimally distributed across all the available memory modules on the board For optimal interleaving one should populate an entire System Board with identically sized DIMMs resulting in a 16 way interleave If populating an entire System Board with memory is not possible memory should be distributed as evenly as possible among the CPUs on all boards for best performance Setting interleave scope to across boards should be avoided unless necessary as it will prevent the domain from performing Dynamic Reconfiguration DR operations For I O configuration check that the capabilities of the cards that are being used match the capabilities of the slot into which the cards are being inserted as much as possible Cards should be distributed between the two controller ASICs and their busses as much as possible for load balancing Conclusion The design of the Sun Fire Midframe servers provide many features which allow for increased RAS Proper installation and configuration planning should be done in order to take advantage of these features to prepare the Sun Fire Midframe server for its role in supporting mission critical applications Conclusion 17 References m Sun Fire 6800 System and Sun Fire Cabinet Rackmount Placement Matrix Sun Document 816 2062
13. domain shell one can only change the password of the particular domain SC security issues relating to SC setup and management are discussed in more detail in the Sun BluePrints OnLine article Securing the Sun Fire Midframe System Controller Sun StorEdge D240 Media Tray Storage Configuration Overview m Mirror boot drives The Sun StorEdge D240 Media Tray has been specially designed for use with systems within a Sun Fire rack The Sun StorEdge D240 Media Tray is an Ultra Fast Wide Single Ended SCSI unit which contains two disk drives and space for two additional DDS 4 tape drives DVD ROM drives or disk drives A typical configuration for a Sun StorEdge D240 Media Tray is two disk drives a DVD ROM drive and a DDS 4 tape drive The Sun StorEdge D240 Media Tray has two redundant power supplies and can also be set for a split bus two separate SCSI bus configuration An ideal configuration utilizes two Sun StorEdge D240 Media Tray arrays with the boot drives mirrored between the two Sun StorEdge D240 Media Tray arrays and separate SCSI cards This configuration is ideal since even in split bus mode the two 8 Sun Fire Midframe Server Configuration Best Practices September 2001 SCSI buses of a Sun StorEdge D240 Media Tray share a common centerplane which could be considered a Single Point of Failure SPOF An example of an ideal setup is shown in FIGURE 4 L C wn Ll A rd ML Bus 2 Bus 3 NI D MAA Mi
14. gment configuration domains A and B are associated with RPO and RP1 so boards for those domains should be chosen from Power Grid 0 Domains Cand D are associated with RP2 and RP3 so boards for those domains should be chosen from Power Grid 1 Configuring domains to use boards from both power grids should be avoided so that in the unlikely event of an RTU failure the effects of the power loss will be limited If a domain depends on both power grids there is twice the likelihood of a power failure causing the failure of the domain This is illustrated by the following examples m Example 1 Domain A is created using RPO RP1 SBO and IB6 Domain C is created using RP2 RP3 SB1 and IB7 If the RTU supplying power grid 1 were to fail domain C would fail but there would be no effect on the operation of domain A A failure of the RTU supplying grid 0 would cause domain A to fail but domain C would remain available m Example 2 Domain A is created using RPO RP1 SB1 and IB6 Domain C is created using RP2 RP3 SBO and IB7 Because domain A was created using SB1 and domain C was created using SBO the domain now has components residing in both power grids so a failure of either RTU or power grids would cause all domains to fail Platform Configuration 15 Slot Grd Pwr Component Type State Status Domain SSCcO On System Controller Passed SSCL Empty Slot S IDO On Sun Fire 6800 Centerplane z z PSO 0 On A152 Power
15. n of single points of failure and the ability to quickly reconfigure around failures should a failure occur To balance mission critical needs with application performance requirements be sure that the operational requirements of the server are clearly understood before proceeding The Sun Fire server line incorporates the concept of domains or multiple independent copies of Solaris Operating Environment running on one system Each domain requires a minimum of one System Board and one PCI or Compact PCI cPCD I O Assembly in order to function The 3800 4800 and 4810 systems can have up to two domains while a 6800 system can have up to four domains Configure each domain with as many redundant components e g I O paths 1 0 assemblies fans etc to increase RAS Availability considerations may thus limit the number of domains a system contains Each Sun Fire I O assembly contains two separate I O controller ASICs Each ASIC provides one 66MHz bus and one 33MHz bus Be sure I O channels within a domain are distributed across I O assemblies the controllers and their busses TABLE 1 TABLE 2 and TABLE 3 illustrate the I O Controller and bus distribution between the slots TABLE 1 Sun Fire 4800 4810 6800 8 Slot PCI I O Assembly Layout Slot Slot Capacity VO Controller Bus 0 33MHz 5 VDC short 0 B 1 33MHz 5 VDC short 0 B 2 33MHz 5 VDC 0 B 3 66 33 Mhz 3 3 VDC 0 A 4 33MHZ 5 VDC 1 B 10 Sun Fire Midframe Server
16. on options in case of a failure In single segment mode the failure of a Fireplane Switch set will cause the domain s in the segment to crash but the system can be reconfigured around the failed switch set and brought back up on the surviving set In a dual segment configuration failure of a Fireplane Switch set will cause the domain s within that segment to fail but since the Fireplane Switch sets in the system are already divided there is no way to configure around the failed component The domains associated with the failed Fireplane Switch will remain unavailable until the failed component is replaced In the case of the 6800 even though a single failed Fireplane Switch means there is a surviving switch in the segment it is not possible to bring up the segment on one switch The 6800 reguires both Fireplane Switches to have a viable segment Additional Sun Fire 6800 Configuration Overview m Keep all devices for a domain in the same power grid For the Sun Fire 6800 server there is an additional consideration to configuring multiple domains in the system The Sun Fire 6800 server differs from all other Sun Fire models in that it has two separate internal power grids each supplied by a different RTU The boards are separated as follows Power Grid O Power Grid 1 SBO SB1 SB2 SB3 SB4 SB5 IB6 IB7 IB8 IB9 RPO RP2 RP1 RP3 14 Sun Fire Midframe Server Configuration Best Practices September 2001 In a dual se
17. res only one SC but can be configured with a second SC for capabilities such as redundant clock signals In configurations which do not come with two SCs a second SC is available through the Redundancy Kit option The SC can be accessed two ways via the built in RS 232 serial port or via its 10 100 Ethernet port Access to the serial port should be available during the initial setup of the SC as this is the only connection where System Controller Power On Self Test SCPOST output can be viewed The serial port can be accessed using a network terminal server or a serial port on an administration workstation The port settings should be 9600 bps 8 bits no parity 1 stop bit 9600 8N1 4 Sun Fire Midframe Server Configuration Best Practices September 2001 Once the Ethernet port has been configured it should be the primary access path to the SC A telnet session is used to connect to the SC from the network Access via the Ethernet port is faster than the serial port and allows for multiple simultaneous connections to the SC A 100BaseT link is strongly recommended for the SC Ethernet connection and required for use with Sun Management Center SunMC When in service access to the serial port should be available to provide an alternate access path to the SC in the event of a network problem or if the SC is rebooted or reset Serial port access is also required to monitor certain SC and platform related errors as this is where these er
18. rors will be displayed However if only one connection is possible the Ethernet port should be chosen as the primary connection path for the speed multi session access and logging capabilities it provides For best performance the SC should be configured on a switched private network FIGURE 3 illustrates a sample network topology If configuring two SCs for the network assign each SC a separate IP address so they do not conflict with each other on the network A private network is also recommended in order to provide additional security for the SC Sun Fire Platform System Controller Public Ethernet Network Admin Station Serial Connection Private Ethernet Network FIGURE3 Simplified Network Topology Platform Configuration 5 6 Once networking is established enable logging to a syslog host This is done using the setupplatform and setupdomain commands and enables the SC to send error messages to another machine where it can be monitored and recorded heslab 12 SC gt setupplatform p loghost Loghosts I 129 146 63 105 local0 heslab 12 SC gt console a Connected to Domain A heslab 12 A gt setupdomain p loghost Loghosts Loghost 129 146 63 105 129 146 63 105 locall heslab 12 A gt Sun Fire TM Midframe Server Configuration Best Practices September 2001 SNMP can also be enabled with the same commands for SunMC support as well heslab 12 SC gt setupplatform p
19. rrored Drives Cable for Bus 2 Cable for Bus 3 WT FIGURE4 Mirroring Disks between two Sun StorEdge D240 Media Tray units and two controllers on two I O Assemblies If utilizing two Sun StorEdge D240 Media Tray units is not possible the Sun StorEdge D240 Media Tray should be placed in split bus mode and the boot drive for the domain should be mirrored across the two halves of the Sun StorEdge D240 Media Tray and connected to separate SCSI cards FIGURE 5 gives an example of this setup LI Bustl LL Bus 2 Mirrored Drives FIGURES Mirrored Disks on Different Busses In some configurations it may not be possible to mount the Sun Fire server and all the desired boot devices in a single cabinet for power or space reasons A separate rack and or alternate storage choices may be required in these cases Be careful to Platform Configuration 9 not exceed maximum SCSI bus lengths if relocating a Sun StorEdge D240 Media Tray into a different cabinet as the Sun StorEdge D240 Media Tray uses Single Ended UltraSCSI connections Configuring Segments and Domains Overview m Configure each domain with component redundancy m For I O configure redundant paths across assemblies and I O busses m Configure each domain in its own segment Once the SC has been set up the next step is to configure the server into segments and domains For the mission critical environment key considerations should be redundancy the eliminatio
20. ry or field installed in a new Sun Fire rack take advantage of new power input and distribution modules unique to the Sun Fire product line Properly configured this new technology can provide power source failover capabilities to the rack and its components Each Sun Fire rack has at least one Redundant Transfer Unit RTU that can contain either one or two Redundant Transfer Switch RTS modules Sun Fire 6800 servers and servers with additional power reguirements will have two RTUs The function of the RTU is to distribute power A single RTS module is capable of supplying full power to a single RTU The RTS module monitors incoming power and in the event of a brownout or power failure attempts to switch incoming power to a second RTS module if it is present At any given time only one RTS will be active indicated by two green LEDs on the RTS module while the second RTS if present will be in a stand by mode indicated by a single green LED on the RTS module RTS modules do not load share If the active RTS loses power failover to a second RTS will occur if one is available The second RTS will then be supplying the RTU with power If a second RTS module is not available the active RTS will eventually shut itself and the RTU off If the second RTS is unable to supply power to the RTU while the first RTS is in a failed state the RTU will shut down If the first RTS has recovered from its failure the second RTS can switch back to
21. the system Overall performance of a customer system requires careful configuration of parts of the system other than the server such as storage and network interfacing which are beyond the scope of this article This section addresses only issues related specifically to Sun Fire servers 16 Sun Fire Midframe Server Configuration Best Practices September 2001 The best configuration for a mission critical Sun Fire 3800 4800 and 4810 server is a single domain system This allows for greater flexibility and redundancy in 1 0 layout and resiliency from failures A single domain configuration also provides for the highest possible level of performance because both Fireplane Switches are available to the single domain to route address and data transactions across the system All resources are dedicated solely for the use of the single domain and do not have to be shared For a Sun Fire 6800 server similar processing and I O flexibility and redundancy can be achieved for two domains as long as each domain is in a separate segment however Fireplane Switch redundancy is lost by segmenting There are two memory interleave configuration options for a domain when the setupdomain command is run They are set by the following two entries interleave scope within board within board interleave mode optimal optimal The default values should be within board and optimal respectively and these are the values recommende
22. tive aux polices de caract res est prot g par un copyright et licenci par des fournisseurs de Sun Des parties de ce produit pourront tre d riv es des syst mes Berkeley BSD licenci s par l Universit de Californie UNIX est une marque d pos e aux Etats Unis et dans d autres pays et licenci e exclusivement par X Open Company Ltd Sun Sun Microsystems le logo Sun Sun BluePrints Sun Fire Sun StorEdge et Solaris sont des marques de fabrique ou des marques d pos es ou marques de service de Sun Microsystems Inc aux Etats Unis et dans d autres pays L interface d utilisation graphique OPEN LOOK et Sun a t d velopp e par Sun Microsystems Inc pour ses utilisateurs et licenci s Sun reconna t les efforts de pionniers de Xerox pour la recherche et le d veloppement du concept des interfaces d utilisation visuelle ou graphique pour l industrie de l informatique Sun d tient une licence non exclusive de Xerox sur l interface d utilisation graphique Xerox cette licence couvrant galement les licenci s de Sun qui mettent en place l interface d utilisation graphique OPEN LOOK et qui en outre se conforment aux licences crites de Sun CETTE PUBLICATION EST FOURNIE EN L ETAT ET AUCUNE GARANTIE EXPRESSE OU IMPLICITE N EST ACCORDEE Y COMPRIS DES GARANTIES CONCERNANT LA VALEUR MARCHANDE L APTITUDE DE LA PUBLICATION A REPONDRE A UNE UTILISATION PARTICULIERE OU LE FAIT QU ELLE NE SOIT PAS CONTREFAISANTE DE PRODUIT
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